Chick pullet might be a roo?

[JK Farms]

I bought a Rhode Island Red "pullet" that's just started to get its wing feathers. Well I have three two week old chicks and then another Rhode Island Red chick the same age. I've been noticing that J (haven't named yet) has been runnin around to every pullet (all were sexed to be girls) and pecking them! I'm used to raising adults and I've raised maybe a hand ful of chicks but it's been off and on. The others don't do this so I'm feeling that I've gotten a rooster What do you guys think?

 

[SunHwaKwon]

Nope, nothing your saying indicates cockerel to me.